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How to limit the length of regression line using ggplot2 in R?
To limit the length of regression line using ggplot2 in R, we can follow the below steps −
- First of all, create a data frame.
- Then, create the scatterplot using ggplot2 with regression line.
- After that, create the scatterplot with regression and add xlim function.
Create the data frame
Let's create a data frame as shown below −
x<-rnorm(20) y<-rnorm(20,5,0.24) df<-data.frame(x,y) df
On executing, the above script generates the below output(this output will vary on your system due to randomization) −
x y 1 -0.988803542 5.414778 2 0.698684062 4.627536 3 0.891143869 4.461881 4 -0.516950077 4.657352 5 0.145037494 5.105152 6 -0.528889920 5.083324 7 1.379575319 4.904177 8 0.975201898 5.240997 9 -0.983342263 4.757083 10 1.458508452 5.219206 11 0.151370004 4.941212 12 -0.656576442 5.526522 13 1.221435134 5.096742 14 -0.441853461 4.976549 15 -0.007734295 5.042228 16 0.250223974 4.584807 17 -1.839967551 4.985860 18 -1.386944529 4.716434 19 -2.143977782 5.016142 20 -0.187381571 5.205459
Create the scatterplot with regression line
Using geom_point and stat_smooth function of ggplot2 package to create the scatterplot with regression line −
x<-rnorm(20) y<-rnorm(20,5,0.24) df<-data.frame(x,y) library(ggplot2) ggplot(df,aes(x,y))+geom_point()+stat_smooth(method="lm") `geom_smooth()` using formula 'y ~ x'
Output
Create the limited regression line
Adding xlim function to the above function to create the limited regression line −
x<-rnorm(20) y<-rnorm(20,5,0.24) df<-data.frame(x,y) library(ggplot2) ggplot(df,aes(x,y))+geom_point()+stat_smooth(method="lm")+xlim(-2.5,2) `geom_smooth()` using formula 'y ~ x'
Output
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